.box{
  margin-top: 50px;
}
*{
  margin: 0;
  padding: 0;
}
body{
  font-size: 14px;
  line-height: 1.5;
  font-family: 'Microsoft Yahei','simsun','arial','tahoma';
  color: #333;
  background: rgba(0,0,0,.03);
}
.btn-style{
  font-size: 20px;
  padding: 20px;
  cursor: pointer;
}
.btn-style:hover{
  color: rgb(59, 142, 236);
}
